The experiment was carried out on female rabbits of New Zealand breed
weighing about 3 kg.

The rabbits from experimental group I received Cladribine
in the dose corresponding to the schema of treatment in the hairy cell
leukemia and the animals from the experimental group II the dose corresponding
to the experimental treatment in multiple sclerosis.

The lacrimal glands
were collected for histological examinations in the light microscope.

It
was observed that administration of Cladribine in the dose corresponding
to the therapeutic dose used in the therapy of hairy cell leukemia could
have caused morphological changes in the lacrimal gland, but the medicine
administered in therapeutic doses in experimental therapy of multiple sclerosis
does not cause morphological changes in the structure of the lacrimal gland
on the level of the light microscope.